Problem scenario
You want to listen to a .WAV (or an .mp3) file on your Ubuntu/Debian/Linux Mint machine from the command line. What should you do?
Solution
Run this: sudo apt -y install sox
Run this (but substitute "/play/to" with the path to your file and replace "nameof.wav" with the name of the file you want to listen to): play /path/to/nameof.wav